10647(  1) - 04/05/05 12:16  - [  1]

    PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS   ST ScI Use Only
                                                       ID:      10647
                                                       Version: 1
                                                       Check-in Date: 05-Apr-2005
                                                                      16:15:58

1.Proposal Title:
High-Redshift Galaxies in GOODS: Simulations vs. Observations
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2. Proposal For  3. Cycle  4. Parallel Pointing Tolerance
AR               14        <none>
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5. Investigators
                                                                                     Contact?
    PI: Prof. Romeel Dave                 University of Arizona
   CoI: Mr. Kristian Finlator             University of Arizona                         N

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6. Abstract

We propose to carry out detailed comparisons of cosmological hydrodynamic
simulations of galaxy formation versus HST/ACS and Spitzer/IRAC observations of z~4
"B-dropout" galaxies in the Great Observatories Origins Deep Survey. The goals are
to (1) Test whether current simulations of galaxy formation produce results
compatible with high-redshift galaxy observations; (2) Constrain model parameters,
particularly those associated with dust extinction and galactic feedback; and (3)
Provide detailed interpretations of observed broad-band colors in terms of galaxy
physical properties such as stellar mass and extinction within a self-consistent
cosmological scenario. We will carry out the comparisons by "observing" simulated
galaxies through the appropriate broad band filters, computing each galaxy's
magnitudes from its star formation history using population synthesis models. From
this, we will gain insights into the physical processes that govern galaxy formation
at these epochs, and provide a baseline concordant model that can be used to compare
simulations to a wider range of observations such as galaxy clustering, redshift
evolution, extragalactic background light, and galaxy properties observed at non-
optical/NIR wavelengths.
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                                                10647(  1) - 04/05/05 12:16  - [  2]

            Summary Form for Proposal  10647

  Item                         Used in this proposal
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  Proposal Category            AR
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